|
37 registered members (Alan_nc),
204
guests, and 216
spiders. |
Key:
Admin,
Global Mod,
Mod
|
|
Forums34
Topics66,569
Posts645,348
Members10,173
|
Most Online3,995 Feb 13th, 2017
|
|
|
Squeal after fitting new crank roller bearings.
#701962
07/16/17 8:56 pm
07/16/17 8:56 pm
|
Joined: Jun 2015
Posts: 54 Cheshire UK.
Nickjaxe
OP
BritBike Forum member
|
OP
BritBike Forum member
Joined: Jun 2015
Posts: 54
Cheshire UK.
|
Hi Guys...fitted a re-built crank to my BSA Bantam 175 2 stroke a few days ago...the bearing are caged needle rollers.
Second outing I could hear a metal to metal scrapping sound...fearing the worse I stripped the engine again.
Nothing obvious....
On first assembly I noticed that the little end bearing was a very snug fit once the conrod pin and bearing where assembled....no play what so ever...also turning the piston on after assembly I could feel a slight notchy feel.
When I looked at it after stripping..it looked as thought the piston pin was getting hot where the bearing runs...also it would not pust out of the piston easy...needed light drifting out...on first assemble it was a light push fit into the piston and bearing.
SO...could a tight little end bearing cause a screeching sound that somebody in a following car could hear...if say it seized on the pin after getting hot.
The engine has only done around 20 miles since its re-build.
All the other bearing in the engine have done less than 1000mls of light road use...they all feel free and smooth.
The big end still looks ok nothing obvious.
Ideas please guys.
Recently bought my 1st ever motorcycle...a humble 1969 BSA Bantam B175...I am enjoying using my Bantam so much...does all I need. My car that I use daily is an old series Landrover that I bought new 40 years ago and has just become tax free.
|
|
|
Re: Squeal after fitting new crank roller bearings.
[Re: ducati2242]
#702229
07/19/17 7:10 pm
07/19/17 7:10 pm
|
Joined: Jun 2015
Posts: 54 Cheshire UK.
Nickjaxe
OP
BritBike Forum member
|
OP
BritBike Forum member
Joined: Jun 2015
Posts: 54
Cheshire UK.
|
So as the piston warm in use...the pin wont lock in the piston? it will actually be the opposite is that correct.
The supplier is looking into it for me now.
Fingers crossed.
Recently bought my 1st ever motorcycle...a humble 1969 BSA Bantam B175...I am enjoying using my Bantam so much...does all I need. My car that I use daily is an old series Landrover that I bought new 40 years ago and has just become tax free.
|
|
|
|
|
|